TOP224PN Equivalent & Substitute Parts Reference

Part Overview

The TOP224PN is an offline switch IC manufactured by Power Integrations, part of the TOPSwitch®-II series. This device functions as a converter for offline Boost, Buck, Flyback, and Forward topologies with 100kHz switching frequency and 30W power output capability. The part is classified as Not For New Designs, indicating it has been superseded in the product lifecycle. Organizations using TOP224PN in existing designs require equivalent alternatives to maintain supply continuity and support ongoing production requirements.

Substiute Parts

TOP224PN

Power IntegrationsIn Stock: 18350TOP224PN Datasheet

Current PartRFQ

TOP244PN

Power IntegrationsIn Stock: 6252TOP244PN Datasheet

SimilarRFQ

TOP221PN

Power IntegrationsIn Stock: 17224TOP221PN Datasheet

Parametric EquivalentRFQ

TOP222PN

Power IntegrationsIn Stock: 17336TOP222PN Datasheet

Parametric EquivalentRFQ

TOP223PN

Power IntegrationsIn Stock: 19404TOP223PN Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for TOP224PN is determined by the following critical parameters:

Primary Substitution Criteria:

• Package / Case: 8-DIP (0.300", 7.62mm) with Through Hole mounting
• Voltage - Breakdown: 700V
• Operating Temperature Range: -40°C ~ 150°C (TJ)
• Output Isolation: Isolated
• Internal Switch(s): Yes
• RoHS Compliance: RoHS Compliant
• Fault Protection: Current Limiting, Over Temperature minimum

Secondary Compatibility Factors:

• Topology support (Boost, Buck, Flyback, Forward)
• Switching Frequency: 100kHz
• Duty Cycle: 67%
• Power rating capability

Substitute parts are grouped into two categories:

Category 1: Parametric Equivalents (TOPSwitch®-II Series) Parts TOP221PN, TOP222PN, and TOP223PN share identical electrical characteristics with TOP224PN except for power output rating. These parts operate at the same 100kHz switching frequency, 67% duty cycle, and 700V breakdown voltage. They are functionally interchangeable when power requirements permit lower wattage operation.

Category 2: Similar Topology Alternative (TOPSwitch®-GX Series) Part TOP244PN operates in Flyback topology only with variable switching frequency (66kHz ~ 132kHz) and includes additional Frequency Control and Over Voltage protection features. This part is suitable for Flyback-specific applications where the extended frequency range and enhanced protection are beneficial.

Parameter Comparison

Engineering Selection Recommendations

For Multi-Topology Applications (Boost, Buck, Flyback, Forward):

When TOP224PN is used in designs requiring multiple topology support, substitute selection depends on power output requirements:

• TOP223PN (25W): Suitable for applications requiring 25W or less output. Maintains identical electrical characteristics including 100kHz switching frequency and 67% duty cycle. Recommended when design power budget permits operation at 25W maximum.

• TOP222PN (15W): Suitable for applications requiring 15W or less output. Maintains identical electrical characteristics. Recommended for lower-power variants of existing designs.

• TOP221PN (9W): Suitable for applications requiring 9W or less output. Maintains identical electrical characteristics. Recommended for minimal-power implementations.

For Flyback-Specific Applications:

• TOP244PN (28W): Suitable when design topology is limited to Flyback operation. Operates at variable switching frequency (66kHz ~ 132kHz) with Frequency Control feature and includes Over Voltage protection. Recommended for Flyback designs where enhanced protection and frequency flexibility provide design advantages.

Compliance and Lifecycle Considerations:

All substitute parts maintain RoHS Compliance, MSL Level 1 (Unlimited), and identical operating temperature range (-40°C ~ 150°C TJ). All parts are classified as Not For New Designs, indicating they are legacy components. Selection should prioritize inventory availability and design topology requirements.

Frequently Asked Questions (FAQ)

Q: Can TOP221PN, TOP222PN, or TOP223PN be used as direct replacements for TOP224PN?

A: These parts are parametric equivalents with identical electrical characteristics (700V breakdown, 100kHz switching, 67% duty cycle, 8-DIP package, Through Hole mounting). They are functionally interchangeable when the application power requirement does not exceed the substitute part's rating. TOP221PN supports up to 9W, TOP222PN up to 15W, and TOP223PN up to 25W. If your design requires 30W output, these parts are not suitable.

Q: Is TOP244PN compatible with all TOP224PN applications?

A: TOP244PN is compatible only with applications using Flyback topology. TOP224PN supports Boost, Buck, Flyback, and Forward topologies. If your design uses Boost, Buck, or Forward topology, TOP244PN cannot be substituted. TOP244PN operates at variable switching frequency (66kHz ~ 132kHz) compared to TOP224PN's fixed 100kHz, and includes additional Over Voltage protection.

Q: Do all substitute parts use the same 8-DIP package?

A: All substitute parts use 8-DIP (0.300", 7.62mm) Through Hole packaging. PCB layout and footprint compatibility is maintained across all listed substitutes.

Q: What is the difference between TOPSwitch®-II and TOPSwitch®-GX series?

A: TOP224PN, TOP221PN, TOP222PN, and TOP223PN belong to the TOPSwitch®-II series. TOP244PN belongs to the TOPSwitch®-GX series. The GX series includes Frequency Control and Over Voltage protection features not present in the II series. Both series operate at 700V breakdown voltage and support isolated output topologies.

Q: Are all substitute parts RoHS compliant?

A: All listed substitute parts are RoHS Compliant with MSL Level 1 (Unlimited) moisture sensitivity rating, matching TOP224PN compliance status.

Q: What inventory levels are available for substitute parts?

A: Current inventory levels are: TOP221PN (17,200 Pcs), TOP222PN (17,300 Pcs), TOP223PN (19,357 Pcs), and TOP244PN (6,164 Pcs) in New Original condition.